Combined type-writing and computing machine.



APPLICATlON FILED APR. 5. |916.

emwaw F. A. HART. COMBINED IYP'E WRITING AND COMPUTING MACHINE."

APPLICATION FILED APR. 5. i916.

Patent-ed Apr. 29, 1919.

3 SHEETS-SHEET 2.

INVENTOFIt MM ATTO EY III/ITN 5555s F. A. HART. vCOMBINED TYPE WRITINGAND COMPUTING MACHINE.

APPLICATION mio Ams. 191s.

Patented Apr. 29,1919.

3 SHEETS-SHEET 3.

|NVENTOR= M @ZM WITNESSE: MGM. Z/ym ATTO N EY.

` yUNITED sTATEs PATENT oEEicE.

FREDERICK A. HART, OF NEWARK, NEW JERSEY, ASSIGNOR TO UNDERWOODCOMPUTING MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEWYORK.

Specification of Letters Patent.

Patented Apr. 29, 1919.

Application filed April 5, 1916. Serial No. 88,982.

To all whom z't may concern:

Be it known that I, FREDERICK A. HART, a citizen of the United States,residin in Newark, in the county of Essex and tate of` New Jersey, haveinvented certain new and useful Improvements in Combined Type-Writingand Computing Machines, of which the following is a specification.

This invention relates to computing machines, or combined typewritingand computing machines, and more particularly to means whereby thevpointing o or spacing between figure-s, as between dollars an cents,and between hundreds and thousands, etc., may be done automatically inthe regular course of writing numbers, so as to relieve the operator ofthe necessity of printing commas or periods, or operating a space key toeffect such spacing.

In my co-pending application, Serial No.l 79,969, led February 23, 1916(now Patent No. 1,282,823, dated October 29, 1918), and in the co-pendinapplication of Andrew W. Steiger, Serial o. 87,672,1iled March 30, 1916,is disclosed mechanism for effecting such automatic spacing. Saidmechanism includes an escapement wheel, which cooperates with a lixmldog and a loose dog supported ona dog rocker, the latter controlled bythe character keys, to effect letterfeed movements of the carriage. Inorder to cause a double-space movement of the carriage at a point whereit is desired to space between figures, a stop member, which controlsthe pivoted dog, is shiftable into a position to permit a greater throwof the dog, so that a double-space movement of' the escapement wheel ispermitted.

The present invention, as herein shown, is applied to a combinedtypewriting and computing machine of the type shown 1n the applicationof Henry Il. Pitman, Serial No. 24,390, filed April 28, 1915, whereinthe totalizer is connected to the latenV carrie e, to travel therewith,and is a just-able to ierent positions along the carriage, to shift thecomputing zone. The totalizer may comprise a series of computi wheelswhlch during the travel of the carriage through the computing zone arebrought successively into cooperative relation to a master wheelcontrolled by the numeral keys, and operable when a numeral key isstruck, to run up the corresponding number on the totalizer.

An object of the present invention is to control the double-spacingmechanism from the totalizer and cause the double-spacing to be effectedautomatically at the points de termined by the position of adjustment of.the totalizer along the carriage. In carrying out the invention, thetotalizer may be provided with a series of tappets, arranged to coperatewith means on the carriage, connected to operate the shiftable stopmember to effect doublespace letter-feed movements of the carriage. Thetappets are so positioned 'that the double spacing will be automaticallyeffected at the desired points. As shown, a bell-crank on the machineframe, in the path of the tappets on the totalizer, is operated by thetappets and is connected through a system of linkages to the shiftablestop member controlling the escapement dog. A non-add or disconnect keymay be provided to prev'ent operation of the computing mechanism whenthe numeral keys are struck, and means may be provided for taking thedouble-spacing mechanism out of the control of the tappets when thisnonadd key is operated. Such means may comprise a slot-and-pinconnection in said system of linkages, and means. operated by the`non-add key, to shift a link carrying said in, into position to causethe pin to work idly in said slot, whereby said shiftable stop membermay remain idle. Means may also be -provided to prevent operation of thedoublespacing mechanism when the usual shift key is operated, to permitprinting with thel upper-case characters. Means for .rendering thecomputing mechanism inoperable by the numeral ys, when a shift key isdepressed, may be similar to that disclosed in the application, SerialNo. 24,390, above referred to; and the means for preventing operation ofthe double-spacing mechanism, while Athe shift ke'y is depressed, maycomprise connections ext-endin from the platen-shifting frame, forshiftlng the link and pin, above referred to, to idle position. In otherwords, the slot-and-pin connection for disabling` t-he double-spacingmechanism v-i's controlled both by the noncomputing key and thespace-shifting key.

Other features-and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a transverse vertical section of Fig. 4 is a similar view,with the escapement dogs rocked rearwardly.

Fig. 5 is a view simil-ar to Fig. 4, except that the escapement is setfor double spacinof.

tFig. 6 is a diagrammatic view of the double-spacing mechanism and thevarious controlling means therefor.

T he ty'pewriting machine, except some of the escapement mechanism whichwill here-- inafter be clearly described, is of the usual Underwoodconstruction., in which the numeral keys 11 and alphabet keys 12, whendepressed, move the key levers 13 and 14, and rock bell-cranks 15 toswing the type bars 16 on their fulcrum rod 17, upwardly and rearwardly,causing types 18 and 19 -to print against a platen 20 on a shaft 21,which is rotatably mounted in a platen frame 22.

The platen 20 is shiftable from lower to upper case, so asto alloweither one of the types 18 or-19 to print, and is guided in itscase-shifting movements by links 23 on a rock shaft 24. AA shift key 25,when depressed, moves the lever .26 provided with an arm'27, and thelatter rocks a shift frame 28 about its pivot 29 to elevate a shift rail30, carried thereby, thus moving the platen frame 22 upwardly.Connection between the shift rail 30 and platen frame 22 is made in theusual manner b a roller 31 and a finger 32 carried by a i ar 33 on theplaten frame.

For propelling the carriage, there is provided a spring drum 36 which isconnected to the typewriter carriage 37 by means of a strap V38.

To control the letter-feed movements of the typewriter carriage, it isprovided with a rack 41 pivoted thereto at42, and meshing w-ith alpinion 43 to rotate an escapement wheel 44, provided with teeth 45. Thepinion 43 is connected to the escapement wheel 44 by the usual one-waydriving pawls 46. This escapement wheel cooperates with a loose dog 47and a fixed'` dog 48 mounted on` 'the carrying frame or dog rocker 49,

The typewriter escapement, except the double spacing feature hereindescribed, is in many respects like that described in the patent to Riceet al., No. 769,804, dated September 13, 1904, and is operated in thefollowing manner.

Each type bar 16 provided with a heel 53 which, whenthe type bar isswung to print- Y ing position, moves the universal bar 54 rearwardlyagainst the tension of a return spring 55 (F ig. 2), and rocks the dogcarrier against the tension of the usual Underwood return spring 56(Fig. 3), lshown in said patent. The spring 56 serves the doublefunction of swinging the loose dog on its pivot 57 when the upper partof the dog carrier is moved rearwardly, and returning the dog carrier tonormal position. Duri the operation of the type bars 16, the dog vrocker 49 is caused to vibrate transversely of the escapement wheel44,thus bringing the teeth of the escapement wheel 44 into fixed dog.When the dog carrier is moved rearwardly, theoose dog 47 is disengagedfrom a tooth 45! of the escapement wheel after the fixed dog 48 hasmoved rearwardlyl into position to engage said tooth vand hold theescapement wheel. The loose dog 47 ywhen thus disengaged is permittedunder the influence of spring 56 to move to a position where it isarrested by a stop 58. When the dog rocker is brought back to poperationalternately with the loose and normal position, the loose dog will beThe wheel being n'ow free,

more movable totalizers 61, arranged tov travel with the typewritercarriage 37, at the front of the machine, on rollers 62 and 63cooperating with a guide rail 64 supported by the machine frame 65. Thetotalizer 61 is connected to the typewriter carriage 37 by a latch 66engaging with any one of several notches in a notched bar 67Y on thetypewriter carriage. The totalizer is I .provided with the regular dialwheels 68 and computing wheels 69, so that the position of the totalizerselects the computing zone.

When an adding zone is reached during the travel 0f the typewritercarriage, the computing wheels are brought into coperative relation, oneat a time, with the master y wheel 73 which 1s rotated through variableangular distances according to digits printed and acts as adenomination-selector in the computing zone selected by the position ofthe totalizer.

To drive the master wheel, there is provided a bail or bar 74 havingdownwardly extending arms 75, one at each side of the machine, pivotallymounted (as shown in said application of Pitman No. 24,390) on a rockshaft 7 6, and moved through differ-v ent angular distances bydiii'erentiators 77. Each numeral-key lever 13 is provided with adiilerentiator 77, the cam slots 78 in the diii'erentiators 77 being ofdifferent shapes to effect the variable movements of the bar 74. Whenlthe machine is set to compute, the variable movements of the bar 74 aretransmitted to a lever 79, secured to the rock shaft 76, by means of anintermediate lever 80, the latter being under constant tension of .aspring 81 to hold the slotted portion 82 of the lever 80 against a pin83 projecting from one of the Varms 75. en any numeral key is depressedit rocks the levers 74, 75, with the result that the lever 80 gives anend thrust. By this the lever 79 is rocked, and pulls the link 84downwardly to swing an arm A85 on a rock shaft 86 to move a second arm87 on the rock shaft 86, and drive a rack 88 by means of a link 89. Theforward movement of the rack 88 rotates a pinion 90 and a gear wheel 91,both pinion and gear wheel being secured to a shaft 92 which isslidable, by an add or a subtract key arranged on the front of themachine (not shown in the drawings), to bring the gear wheel 91 intomesh with an intermedi-` ate pinion 93, or a pinion 94 mounted on ashaft 95.

It should be understood that the master wheel 73 and the pinion 94 areboth secured to the shaft 95, that the pinion 93 is coni stantly in meshwith the pinion 94, and that the gear wheel 91 is so arranged that itcan be in mesh with either one of said pinions, but only one at a time.lVhen the machine is set for addition, the gear wheel 91 meshes with thepinion 94, and movement is trans mitted to the master wheel directlyfrom the gear wheel 91 through the pinion 94, but when the machine isset for subtraction, motion is transmitted from the gear wheel 91 to thepinion 93 and then to pinion 94, to rotate the master wheel in theopposite direction.

To prevent accidental displacement between the master Wheel 73 and thecomputing wheel 69 during lthe computing operation, there is provided alocking lever 96 on a shaft 97, the lever engaging in one of a series ofslots 98 in a bar 99 on the totali'zer 61 at each computing operation,said lever being operated in the usual way (not shown in the drawings).

To disconnect or, in other words, to make the computing mechanisminoperative when writing numbers in 'a computing zone, I

have provided a disconnect key 101 which, when thrown forward, about itspivot 102, moves a link 103 to rock a lever 104, an arm 105 on saidlever moving the intermediary lever 80 against the tension of thelspring 81, so that the'slotted portion becomes disengaged :t'rom the pin83. Thus it will be seen that if a numeral lever is now depressed, thebar 74 will be moved forwardly, but this motion will be ineffectiveto'move the train of connections to the master wheel, since theconnection between said -bar and intermediate lever 80 has-been broken.

To disconnect Vthe computing machine during the shifting operation ofthe platen, which is necessary when the numeral type bar is providedwitha numeral and other' character of type, so as to prevent computing" whenthenumeral keys are operated while the carriage is in a computing zoneand the vplaten shifted to upper case, the lever 104 is connected to theshift `frame 28 by means of a link 106. Thus, when the platen is shiftedto upper case position, the' platen shift frame 28 is rocked as herein-'before explained and through the link 106 and lever 104, moves theintermediate lever 80 out of coperative relation withthe pin 83. Toprevent shifting the shift frame 28 when thedisconnect key 101 isshifted, I have provided a lost motion connection 108 between the frame28 and link 106. 'A similar connection 107 between the link 103 anddisconnect key 101, permits the latter to remain at rest when the frame28 is shifted.

The ymeans for effecting double space movements of the typewritercarriage at predetermined positions during its travel, will now bedescribed. The stop 58 which normally controls the swinging escapementdog 47, as heretofore described, is carried on a shiftable stop memberlor lever 110 pivoted on agstud 111 on the escapement bracket 112, thelever being held in position lengthwise of the stud by nuts 113, 114. Asecond stop 115 on said lever is so positioned that when the lever isrocked from the Fig. 4 position to the Fig. 5 position, the stop 115 isbrought into the path of the dog 47, while the stop 58 is moved out ofthe path of a pin 117 on the dog, ermitting the do (when released from t1e escapement w eel) to swing to thc left until arrested by striking thestop 115. If the dog rocker 49 is now .rocked to disengage the xed dog48 from the escapement wheel, the latter is permitted a double spacemovement, as one tooth 45 has been skipped by the. pivoted dog.

The stop lever 110 is held in its normal position by a spring 116, butis rocked against the tenslon of said sprin to the double spacingposition by the ollowin means. The totalizer 61 is provided witg tappets121 arranged at the 'upper part of the bar 99/in position to clear thelever 96 as the latter moves along said bar during the travel of thetypewriter carriage'. A bell crank lever 122 is loosely mounted to swingon the rock shaft 97 and comprises an upright arm which extends into thepath of the tappets 121 to be cammed rearwardly by the tappets as thecarriage approaches positions. at which it is desired to effect doublespace letter-feed movements.

lll/'hen the bell crank 122 strikes a tappet 121 it is rocked to movedownwardly a link 123 connected to the horizontal arm of the bell crank.Said link is connected with the forward end of a rock arm 124 xed to arock shaft 127 pivoted on the machine frame 65, lto which rock shaft isalso fixed a rearwardly extending rock arm 125. The downward movement ofthelink 123 operates through said rock arms and a link 126 connectingthe arm 125 to the stop lever 110, to swing the latter to the Fig. 5position, permitting a double space movement of the escapement. y

. lThe dia-l wheels 68 are arranged in groups as shown in Fig. 2, with aspace provided between the thousands and the hundreds wheel, and alsobetween the units and cents wheel. There are as many slots 98 in thebar'99, as there are dial wheels, the locking lever 96 engaging in aslot while the corre- .sponding dial wheel is being rotated. Thus itwill be seen that the slots 08 are arranged in groups which correspondto the grouping of the dial wheels 68.

To explain more clearly the double space movements of the typewritercarriage, let it be assumed that the totalizer has reached the tenthousands position, the totalizer being moved by the carriage. In thisposition one of the tappets 121 is ready to engage the lever 122. lf wenow print in this position, the escapement mechanism will operate asusual to permit the carriage to advance a single letter-space distance.This movement of the carriage, however, will cause the tappet 121 toswing the lever 122on the rock shaft 97, and through the train ofconnections hereinbefore described, shift the stop 115 to the Fig. 5position, so that on the next depression of a numeral key (the carriagenow being in the thousands position), the lose dog 47 will be permittedto move to the position shown in Fig. 5, where it is arrested by thestop 115. Vhen the dog rocker is allowed to return to normal position,the loose dog will move back of lthe adjacent tooth 45 and engage withthe nextl tooth, permitting a double space movement of the escapementwheel, and the carriage will be fed two letter space distances.Automatic double spacing is in like manner effected at the decimal pointposition, and at any other desired points in the computing zone bycorrespondingly located tappets 121.

To make the double spacing ineffective,

which is desirable when the platen is shifted to upper case position, orwhen the computing machine is set to disconnect,I have found itadvantageous to provide a slot 131 in the arm 124, and connect the link123 to the arm 124 by a headed pin 132 which is slidable in the slot bymeans of a link 133 connected to an arm-134 extending from a rock shaft135. Both the lever 104 and the arm 134 are secured to the rock shaft135, the arm 134 being near the middle of the machine. Thus it will beseen that. when the lever 104 is moved by the disconnect key 101 or bythe shift frame 28, the link 133 will be moved forwardly to bring` thepin 132 to the vertical portion of the slot 131. Then the pin is in thisposition, the link 123 will be ineffective to move the arm 124, foralthough the lever 122 is actuated by the tappets 121, it will beineffective to shift the stop member 110 as the pin 132 will move up anddown idlyA in the vertical portion of the slot 131. A light spring 13Gis provided to hold the link 123 up in its normal position when the pin1,32 is shifted to the vertical part of the slot 131.

`Variations may be resorted to within the scope of the invention, andportions of the improvements may be used without others.

Having thus described my invention, I claim:

1. ln a. combined typewriting and computing machine,v the combination ofa typewriter carriage, means for propelling said,

typewriter carriage, reciprocating escapement devices which ordinarilypermit the carriage to move single letter space distances, a totalizerarranged to travel with the typewriter carriage, and means controlledfrom said totalizer for `allowing the typewriter carriage to move morethan a single letter space by a single reciprocation of said escapemcntdevices.

2. In a combined typewriting and computing machinel the combination of atypewriter carriage, means for propelling said typewriter carriage,reciprocating escapement devices which ordinarily permit the carriage tomove single letter .space distances, a machine frame, a totalizerarranged to travel with the typewriter carriage, a series of tappets onthe totalizer, and a cooperating member movably mounted on the machineframe in the path of thetappets and operated thereby, and means whereb vthe movement of said member sets said escapement devices to permit thecarriage to move more than a single letter space distance by a singlereciprocation of said esca-pement devices. I

3. ln a combined typewriting and computing machine. the combination of atypewriter carriage` a totalizer, means for propelling said carriage,reciprocating escapement devices including a fixed and a loose dog, andmeans with which said loose dog coperates to ordinarily permit singleletter space movements of the carriage and to eiiect double'spacemovements at predetermined positions in the travel of said typewritercarriage, said means being automatically shiftable and controlled fromthe totalizer during the travel of the typewriter carriage.

4. In a combined typewriting and computing machine, the combination of atypewriter carriage and a totalizer arranged to travel therewith, meansfor propellingr said typewriter carriage, a variable feed escapementwhich normally allows the carriage to be fed a single letter spacedistance at each operation, said escapement including an escapementwheel, a dog rocker` a fixed and a loose dogcarried by the dog rocker, aplurality of stops for said loose dog, and means for shifting said stopsalternatively into cooperative relation with said loose dog, saidshifting means being controlled from said totalizer.

5. In a combined typewriting and computing machine. the combination witha carriage and driving meansv therefor, of an escapement mechanismcontrolling the letter feed movements of said carriage, said mechanismcomprising a wheel. a fixed dog and a loose dog coperating with saidwheel, a movable stop member adapted to control the throw of said loosedog, a totalizer mounted to travel with the carriage, and means formoving said stop member to eifect an extra throw of said dog in writinga digit immediately atthe left of a pointing off space, said means beingcontrolled from said totalizer.

6. In a combined typewriting and computing machine, the combination witha carriage. of an escapement wheel for said'carriage, a loose dog forpermitting said escapement wheel to be fed, a movable stop membercontrolling the throw of said dog, a tot-alizer, and means forselectively controlling said movable stop member, said means beingcontrolled from said totalizer.

7. In a computing machine. a totalizer comprising computing wheels'arranged in groups with a space between said groups, a' master wheel,means for bringing said computing wheels, one at a time, and the masterwheel into cooperative relation with 1 each other, reciprocatingescapement devices to permit a step by step relative movement betweensaid master wheel and said comput-` ing wheels. a series of tappetswhich are connected to said totalizer to bear a fixed relation withreference to the computing wheels, a. coperative member engaging withsaid tappets for controllingsaid-escapement devices to cause them by asingle reciprocation to effect a greater relative movement between saidmaster wheel and computing wheels when the space is reached between saidgroups of computing wheels.

8. In a combined typewriting and computing machine, the combina-tion ofa carriage, an escapement wheel normally holding said carriage, a loosedog for feeding said escapement wheel and normally holding it, selectivemeans for controlling said dog to permit said escapement wheel to be fedby said dog either one or two letter spaces, a totalizer, and meansactuated thereby to operate said selective means and thereby cause saidloose dog to feed the carriage two letter spaces'. g

9. In a combined typewriting and computing machine, the combination ofacarriage. a variable feed escapement for said carriage, a totalizertraveling with said carriage, means controlled from said totalizer forpermitting double space movements at predetermined positions in thetravel of said carriage, computing mechanism, keys controlling saidmechanism, means for taking said computing mechanism out of the controlof said keys, and means for rendering said double space permittingmechanism ineffective when said computing mechanism is out of thecontrol of said keys.

10. In a combined typewriting and computing machine, the combination ofa carriage, a variable feed escapement for said carriage, a totalizer,means controlled from said totalizer for effecting double spacemovements at predetermined positions in the travel of said carriage,computing mechanism` means for disconnect-ing said computing mechanism,and means for providing a lost motion connection between the totalizerand said double space determining mechanism to render said double spaceescapement mechanism ine'ective when the computing mechanism isdisconnected.

11. In a combined typewriting and computing machine, the combination ofa carriage, a variable feed escapement for said carriage, a totalizer,means controlled from said totalizer for effecting double spacemovements of the carriage at determined positions in its travel, saidmeans comprising a bell crank connected to a lever of the first order bya link, and a shiftable stop menr'ber connected to said lever by alsecond link, computing mechanism, means for disconnecting said computingmechanism, and means providing a lost motion connection between one ofsaidlinks and said vlever to render said shiftable sto' memberinoperative when said computing mechanism is disconnected.

12. In a combined typewriting and computing machine, the combination ofa ca rriage, a variable feed escapement for said carriage,"a totalizer,means controlled from said totalizer for effecting double spacemovements of the carriage at determined 'provided with a pin which isshiftable to the vertical portion of a slot in said lever, so that thepin will move idly in said slot should the link be operated.

13. 1n a combined typewriting and computing machine, the combination ofa carriage, a variable feed escapement for said carriage, a totalizer,means controlled from said totalizer for permitting double-spacemovements of and at predetermined positions in the travel of saidcarriage, and means for rendering said double-space permitting meansineective.

14. 1n a combined typewriting and computing machine, the combination ofa carriage, a variable feed escapement for said carriage, a tot-alizer,means controlled from said totalizer for effecting double-spacemovements of and at predetermined positions in the travel of saidcarriage, a train ot linkages between the totalizer and saiddouble-space permitting means, and means for providing a lost motion insaid train of linkages to render said double-space permitting meansineffective. i

15.1n a combined typewriting and coinputing machine, the combination ofa carriage, an escapement for said carriage, a totalizer traveling withsaid carriage, a double-space permitting device controlled from saidtotalizer, a case-shift key, and means controlled from said case-shiftkey for rendering said double-space permitting device ineffective.

16. In a combined typewriting and computing machine, the combination'ofa carriage, an escapement for said carriage, a totalizer adjustablypositioned to select a computing zone, a doublespace-permitting devicefor said carriage, means controlled by said totalizerrior renderingsaiddoublespace-permitting device effective, a case-shift key,` adisconnect key for the computing machine, and means controlled from thecaseshift key and the disconnect key for rendering the double-spacepermitting device in effective.

17. 1n a combined typewriting and computing machine, the combinationwith a carriage and driving means therefor, of escapement mechanismcontrolling the letter-feed movements of the carriage, a totalizerconnected to travel with the carriage, numeral keys for printingnumerals and controlling said escapement mechanism to effect letterfeedmovements of the carriage, computing mechanism operated by the numeralkeys for running up on the totalizer numbers corresponding to those ofthe operated keys, and a double-spacing means controlled from saidtotalizer and operable automaticallyv to efi'ect a double-spaceletter-feed movement of the carriage when the totalizer reaches apredetermined position in the computing zone, to thereby point off orspace between figures at a correspondingl point in the number beingWritten.

18. n a combined typewriting and computing machine, the combination witha carriage and driving means therefor, of escapement mechanismcontrolling the letter-feed movements of the carriage, a totalizerconnected to travel with the carriage, numeral keys for printingnumerals and controlling said escapement mechanism to effect letter-`feed movements of the carriage, computing mechanism operated by thenumeral keys for running,f up on the totalizer numbers corresponding tothose of the operated keys`v a double-spacing means controlled from saidtotalizer and operable automatically to effect a double-spaceletter-feed movement of the carriage when the totalizer reaches apredetermined position in the computing zone, to thereby point ofi orspacel between figures at a corresponding point in the number beingWritten. a disconnect key operable to take the computing mechanism outof the control of the numeral keys. and means controlled by saiddisconnect key for silencing the double-spacing means.

19. 1n a combined typeyvriting and computing machine, the combinationwith a carriage and driving means therefor. of escapenient mechanismcontrolling the letter-feed movements of the carriage. a totalizerconnected to travel with the carriage. numeral keys for printingnumerals and controlling said es apefrnent mechanism to effectletterfeed movements of the carriage, computing llO mechanism operatedby the numeral keys for running up on the totalizer numberscorresponding to those of the operated keys. a double-spacing meanscontrolled from said totalizer and operable automatically to effect adouble-space letter-feed movement of the carriage when the totalizerreaches a predetermined position in the computing zone'. to therebypoint ofi' or space between figures at a corresponding point in thenumber being Written, a case shift key,A and means controlled therebyfor silencing said doublespacing means.

20. In a combined typewriting and computting machine, the combinationwith a traveling typewriter carriage. of a totalizer adjustablerelatively to said carriage, an escapement device for said carriage.typewriter numeral keys adapted to Write upon said carriage, and toeffect computation of digits in said totalizer, differential-throw meansuniversal to said keys by which said computation is effected, meanswhereby said escapement device may feed said carriage a doubleletter-space, connections whereby said totalizer automatically makessaid doubleletterlspace means effective at pointing-off places, meansfor making said differentialthrow means ineffective to com ute, andconnections whereby saiddouble eeding means is automatically madeineffective when the differential-throw means is'made ineffective tocompute.

2l. In a combined typewriting and coinputing machine, the combinationwith a typewriter carriage, of a rack bar adapted to travel with saidcarriage, escapement devices normally feeding said carriage singleletter-space distances, a totalizer adapted to be adjustably set alongsaid rack bar` means effective to cause said escapement devices to feedsaid carriage a double letter-space, and an extension of said totalizeradapted to selectively cause said last-named means to become effective.

22. In a combined typewritingl and computing machine, the, combinatlonwith a typewriter carriage, of a rack bar adapted to travel with saidcarriage, escapement devices normally feeding said carriage singleletter-space distances, a totalizer adapted to be adjustably set alongsaid rack bar, means effective to cause Said escapement devices to feedsaid carriage a double letter-space, a dog for operating said means, andtappets concealed by said totalizer but forming part thereof foroperating said dog to cause a double letter-space movement of saidcarriage.

23. In a combined typewriting and computing machine, the combinationwith a typewriter carriage, of a totalizer adjustable relatively to saidcarriage, said totalizer including a series of wheels`denominationselecting means t select said wheels as determined by theadjustment for relative cooperation 'of the carriage, totalizer. andselecting means, numeral keys, key-actuated means for writing digitsspaced apart at pointingsoff places and foreffecting computation in Saidtotalizer, key-controlled es-v capement devices to effect the travel ofsaid carriage, and means controlled by the relative positioning of saiddenomination-selecting means and said totalizerfor effecting at each' ofsaid pointing-off places a double feeding-of said carriage for a singleoperation of said .escapement devices.

24. In a combined typewriting and computing machine, the combinationwith a traveling typewriter carriage, of a totalizer adjustablerelatively to said carriage, a platen vforming part of said carriage, adenomination-selector, wheels forming part of said totalizer adapted tobe selected by said selector in columns determined by the adjustment forrelative cooperation `of the carriage, totalizer and selector,typewriter numeral keys adapted to write upon said platen digits spacedapart at pointing-off places, and to effect computation of said digitsin said totalizer, escapement devices controlled by said keys to effectthe travel of said carriage in printing the digits and selecting thewheels, means to enable a single operation -of the escapement devices toeffect a double fee-ding of said carriage, connections automaticallymade effective bv said adjustment for determination of thefcomputingzone, for making said double-feeding means effective at everypointing-off place between digits computed in said totalizer, acase-shift adapted to cause the keys to selectively write in one of twocases, andmeans for making said double-feeding means ineffective byoperation of said case-shift.

25. In a combined typewriting and cornputing machine, the combinationwith a traveling typewriter carriage, of a totalizer adjustablerelatively to said carriage, a platen forming part of said carriage, adenommation-selector, wheels forming part of said totalizer adapted tobe selected by said selector in columns determined by the adjustment forrelative coperation of the carriage. totalizer and selector, typewriternumeral keys adapted to write upon said platen digits spaced apart atpointing-off places, and to effect computation of said digits in saidtotalizer, escapement devices controlled by said keys to effect thetravel of said carriage in printing the digits and selecting the wheels,means to 'enable a single operation of the escapement devices to 105effect a double feeding of said carriage, connections automatically madeeffective by said adjustment for determination of the computing zone,for making said doublefeeding means effective at every pointingoff placebetween digits computed in said totalizer, a device for making saidnumeral keys ineffective on said wheels, and a connection whereby saidlast-named device makes said double-feeding means ineffective.

26. In a combined typewriting and computing machine. the combinationwith a traveling typewriter carriage, of a totalizer adjustablerelatively to said carriage, a platen forming part of said carriage, adenomination-selector, wheels forming part of said totalizer adapted tobe selected -by said selector in columns determined by the adjustmentfor relative coperation of the carriage, totalizer and selector,typewriter nu- 1.25 meral keys adapted to write upon said platen digitsspaced apart at pointing-ofi places, and to eect computation of saiddigits in said totalizer, escapement devices controlled by said keys toeffect the travel of said cartive atv every pointing-od place betweendigits computed in said totalizer, a device for making said numeral keysmef'fective on said wheels, a connection whereby said .last-named devicemakes said double-feeding means ineffective, a case-shift for makingsaid keys effective to write selectively in one of two cases, and meanswhereby said caseshift operates said last-named device.

v 27. In a Acombined typewriting and computing machine, the combinationwith a traveling typewriter carriage, of a totalizer adjustablerelatively to said carriage, a platen forming part of said carriage, adenomination-selector, computing wheels forming part of' said totalizeradapted to be selected by said selector in `columns determined by theadjustment for relative cooperationy of the carriage, totalizer andselector, typewriter numeral keys adapted to write upon said platendigits spaced apart at pointing-off places, and to effect computaytionofsaid digits in said totalizer, escapement devices controlled by saidkeys to effect the travel of said carriage for printing the digits and'selecting the wheels, a lever shiftable to enable a single operation ofthe escapement devices to effect a double feeding of said carriage, alink for operating said lever, a pin on said link normally engaging aslot in said lever, said slot comprising an extension to permit the idleoperation of the link, connections automatically made effective bythe'adjustment for said determination of the computin zone for makingsaid link effective on said lever, to make the double-feeding levereffective at every pointing-off place between digits Acomputed 1n saidtotalizer,'a device for making said keys ineffective to compute, andmeans whereby said last-named device is eEective to shift said link tomake it idle with respect to said lever.

28. In a combined typewriting and computing machine, a typewritercarriage, a carriage-feed mechanism including escapement devices topermit the carriage to move single letter-space distances, a totalizerconnected with the typewriter carriage to travel therewith, and meanscontrolled by said totalizer to modify the action of the escapement tocause feed movementsof more than a single letter-space.

29., In, a combined typewriting and computing machine, the combinationof a typewrite r carriage, a totalizer connected to travel therewith, anescapement feed for said Carr-lage including a fixed aid a loose dog,

controlling means for said loose dog to cause single and double spacemovements of said carriage, and totalizer-actuated means to operate saidcontrolling means to cause doublespare movements of said carriage.

30. In a combined typewriting and computing machine, the combination ofa carriage, a variable feed therefor, computing mechanism including atotalizer connected to move with said carriage, totalizer-controlledmeans to cause double space movementsof said carriage, and means forrendering ineffective concomitantly said computing mechanism and saidmeans to cause vdouble space movements.

31. In a combined typewriting and computing machine, the combination ofa carriage, an intermittent feed therefor, a totalizer connected to movewith said carriage, and totalizer-controlled means for varying themovement o'f said intermittent feed.

32. In a combined typewriting and computing machine, the combination ofprinting means, a typewriter carriage, a step-by-step feed to move saidcarriage relatively to said printing means, a totalizer movable withsaid carriage, totalizer-actuated means for varying the movement of saidfeed to effect double space movements of said carriage, and means forrendering said totalizer-actu.- ated means inefective to vary the motionof said feed.

33. In a combined typewriting and computing machine, the combination ofa platen, a carriage for saidv platen, a .step-by-step feed device forsaid carriage, a totalizer movable with said carriage,totalizer-actuated means for causing double feed movements of said feeddevice, a case-shift device including a case-shift key, and meansactuated by the case-shift device for rendering said totalizer-actuatedmeans ineffective:

34. In a combined typewriting and computing machine, computingmechanism, a typewriter carriage, a carriage-feed to give letter-spacemovements, means controlled by` for rendering saiddouble-space-permittingv means effective.

36. In a combined typewriting and computing machine, the combination ofa car- 1 rage, means for propelling said carriage, a variable feedesc'apement for said carriage, means for` permitting double-spacemovements in colmnar positions of said carriage, a totalizer adapted tobe set at any columnar position in which `the double-space movements ofthe carriage are to be effected, and

means engaged by said totalizer, for rendering saiddouble-space-permitting means effeotive.

FREDERICK A. HART. Witnesses:

ARTHUR A,'JoHNsoN, EDITH B. LIBBEY.

